Description
The Gwinnett County Government is soliciting bids for the purchase of butterfly valves for the Lanier and Shoal Creek Filter Plants. The contract includes the replacement of existing valves with new ones that meet AWWA standards and design criteria. The replacement valves should be double offset butterfly valves operated by existing manual/electrical operators with replacement gearboxes. The contractor will be responsible for designing, manufacturing, and delivering the valves, as well as providing operating and maintenance instructions. The project requires the replacement of 17 valves of various sizes, ranging from 54" to 108".
• The valves must be suitable for throttling operations and infrequent operation after periods of inactivity.
• The valves must be of the double offset design, with an elastomeric seat that is not in compression at any degree of opening except at full closure.
• The valves must be sized for bidirectional water service, full rated pressure, and rated for a maximum velocity of 16 feet per second in the upstream pipe.
• The valves must have zero leakage across the closed valve during shop tests at the rated pressure in each direction.
• The contractor must provide certification that the components and materials in contact with water for human consumption comply with the requirements of the Safe Drinking Water Act and other applicable federal, state, and local requirements.